PDF malware analysis — malicious · c89b305332c39b0b

MALICIOUS

PDF

40.5 KB Created: 2020-08-13 03:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: aa8adfdf157519cc53cabbb904b9131c SHA-1: d1c182a82a9f5fa1478268cb315766f39979777f SHA-256: c89b305332c39b0bd9aac7b81df58edb8af89e8dab356f04d5a1ce2fee46cf52

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=basic+english+language+test+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which are hosted on cdn.shopify.com but also include potentially malicious domains. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link within the document.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://ttraff.ru/pify?keyword=basic+english+language+test+pdf
- http://somukoto.coastaldanceclub.co.uk/uploads/1/3/1/4/131408899/mezanamelexos_woludumivapur_tutegotixuw_zebexerolukofe.pdf
- http://files.moveovermsa.org/uploads/1/3/1/6/131606631/8576641.pdf
- http://files.solutions2050.com/uploads/1/3/2/7/132740620/acd8710342bcf6.pdf
- https://cdn.shopify.com/s/files/1/0434/0508/2781/files/penyebab_aterosklerosis.pdf
- https://cdn.shopify.com/s/files/1/0430/5967/5290/files/proverbes_anglais_franais.pdf
- https://cdn.shopify.com/s/files/1/0435/5801/1035/files/tugan.pdf
- https://cdn.shopify.com/s/files/1/0433/8502/8758/files/wevitidefo.pdf
- https://cdn.shopify.com/s/files/1/0433/5815/9006/files/26197542780.pdf
- https://cdn.shopify.com/s/files/1/0431/4900/0864/files/nakugewotarudumupirizagon.pdf
- https://cdn.shopify.com/s/files/1/0437/3685/8776/files/93939456566.pdf
- https://cdn.shopify.com/s/files/1/0434/8765/8150/files/albeniz_suite_espanola_guitar.pdf
- https://cdn.shopify.com/s/files/1/0432/6257/4750/files/87266036423.pdf
- https://cdn.shopify.com/s/files/1/0432/8289/0918/files/uk_cabinet_manual.pdf
- https://cdn.shopify.com/s/files/1/0430/3316/5986/files/regovezole.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005366.bin` `6992438a95b614ecf163d3f6f3e5c93cd0c296630d13b4e308ce38dd5a31368f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5366	5140 bytes
`font_01_sfnt_off000064d7.bin` `a0ac5c731558ec48ba7b7500fa43e32dceb4ad692107779c3b22fd0e3a694fc7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x64D7	10084 bytes
`font_02_sfnt_off00008758.bin` `d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8758	4324 bytes

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